| 引用本文: | 李颖,魏急波.OFDM抗多径机理分析与系统仿真.[J].国防科技大学学报,2004,26(5):34-38.[点击复制] |
| LI Ying,WEI Jibo.Analysis and Simulation of the Principle of Antimultipath in the OFDM System[J].Journal of National University of Defense Technology,2004,26(5):34-38[点击复制] |
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| OFDM抗多径机理分析与系统仿真 |
| 李颖, 魏急波 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 抗多径衰落是正交频分复用(OFDM)系统的显著特点之一。具体分析了OFDM抗多径的机理，说明了两种不同情况下多径对信号频谱的影响，并提出了相应的减轻多径影响的方法。通过仿真分析验证了HiperLAN Type2标准规定的OFDM系统的抗多径性能，并提出了一些改善系统性能的方法。 |
| 关键词: 正交频分复用 多径信道 循环前缀 信道间干扰 |
| DOI： |
| 投稿日期：2004-07-20 |
| 基金项目:国家自然科学基金资助项目(60172078) |
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| Analysis and Simulation of the Principle of Antimultipath in the OFDM System |
| LI Ying, WEI Jibo |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The OFDM system has a very good performance on antimultipath. We illustrate the principle of antimultipath and analyze the impact of the multipath channel on an OFDM signal spectrum in two cases. Then we discuss the algorithms to reduce it. In a two-path channel, we simulate the OFDM system based on HiperLAN Type2 PHY protocol and analyze its performance. In the end, we offere some proposals for improving the performance of the system. |
| Keywords: OFDM multipath channel CP ICI |
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